feat: add Docker support with environment configuration and entrypoint script

.env.example

@@ -0,0 +1,39 @@
+# EchoHub Server Configuration
+# Copy this file to .env and customize as needed:  cp .env.example .env
+# These override appsettings.json via ASP.NET Core's configuration hierarchy.
+
+# ── Server ───────────────────────────────────────────────────────────
+Server__Name=My EchoHub Server
+Server__Description=A self-hosted EchoHub chat server
+Server__PublicServer=false
+# Server__PublicHost=echohub.example.com
+# Server__Admins__0=adminUsername
+
+# ── JWT ──────────────────────────────────────────────────────────────
+# Auto-generated on first run if left empty. Only set if you need a stable secret across containers.
+# Jwt__Secret=
+# Jwt__Issuer=EchoHub.Server
+# Jwt__Audience=EchoHub.Client
+
+# ── Encryption ───────────────────────────────────────────────────────
+# Auto-generated on first run if left empty.
+# Encryption__Key=
+# Encryption__EncryptDatabase=false
+
+# ── Storage ──────────────────────────────────────────────────────────
+# Defaults are set in the Dockerfile to use /app/data for persistence.
+# Storage__CleanupIntervalHours=1
+# Storage__RetentionDays=30
+
+# ── IRC Gateway ──────────────────────────────────────────────────────
+Irc__Enabled=false
+# Irc__Port=6667
+# Irc__TlsEnabled=false
+# Irc__TlsPort=6697
+# Irc__TlsCertPath=
+# Irc__TlsCertPassword=
+# Irc__ServerName=echohub
+# Irc__Motd=Welcome to EchoHub IRC Gateway!
+
+# ── Logging ──────────────────────────────────────────────────────────
+# Serilog__MinimumLevel__Default=Information

docker-compose.yml

@@ -12,12 +12,8 @@ services:
       # - "6697:6697"   # IRC (TLS encrypted, preferred)
     volumes:
       - echohub-data:/app/data
-    environment:
+    env_file:
-      - Server__Name=My EchoHub Server
+      - .env
-      - Server__Description=A self-hosted EchoHub chat server
-      # - Server__PublicServer=true
-      # - Server__PublicHost=echohub.example.com
-      # - Irc__Enabled=true
 
 volumes:
   echohub-data:

docs/articles/docker.md

@@ -0,0 +1,130 @@
+# Docker
+
+## Quick Start
+
+```bash
+cp .env.example .env        # create your config
+docker compose up -d         # start the server
+```
+
+On first run the server automatically generates JWT and encryption keys, creates the database, and seeds a `#general` channel. Connect with the EchoHub client to `http://localhost:5000`.
+
+### Using a Pre-built Image
+
+Instead of building locally, you can pull from GHCR. In `docker-compose.yml`, replace the `build` block:
+
+```yaml
+services:
+  echohub-server:
+    image: ghcr.io/huebyte/echohub-server:latest
+    # build:
+    #   context: ./src
+    #   dockerfile: EchoHub.Server/Dockerfile
+```
+
+## Configuration
+
+All settings are configured through the `.env` file. These are ASP.NET Core environment variables that override `appsettings.json`.
+
+| Variable | Default | Description |
+|---|---|---|
+| `Server__Name` | My EchoHub Server | Display name for your server |
+| `Server__Description` | A self-hosted EchoHub chat server | Server description |
+| `Server__PublicServer` | `false` | List on the [public directory](https://echohub.voidcube.cloud/servers) |
+| `Server__PublicHost` | *(empty)* | Public address for the directory listing |
+| `Server__Admins__0` | *(empty)* | Admin username (use `__1`, `__2` for more) |
+| `Jwt__Secret` | *(auto-generated)* | JWT signing key. Auto-generated on first run |
+| `Encryption__Key` | *(auto-generated)* | AES encryption key. Auto-generated on first run |
+| `Encryption__EncryptDatabase` | `false` | Encrypt message content in the database |
+| `Storage__CleanupIntervalHours` | `1` | How often to clean expired uploads |
+| `Storage__RetentionDays` | `30` | Days to keep uploaded files |
+| `Irc__Enabled` | `false` | Enable the IRC gateway |
+| `Irc__Port` | `6667` | IRC plain-text port |
+| `Irc__TlsEnabled` | `false` | Enable IRC over TLS |
+| `Irc__TlsPort` | `6697` | IRC TLS port |
+| `Irc__ServerName` | `echohub` | IRC server name shown to clients |
+| `Irc__Motd` | Welcome to EchoHub IRC Gateway! | Message of the day |
+| `Serilog__MinimumLevel__Default` | `Information` | Log level (`Debug`, `Warning`, etc.) |
+
+## Persistent Data
+
+All server state lives in a single Docker volume mounted at `/app/data`:
+
+```
+/app/data/
+├── appsettings.json   # generated config with JWT/encryption keys
+├── echohub.db         # SQLite database
+├── uploads/           # uploaded files and avatars
+└── logs/              # rolling log files (14-day retention)
+```
+
+### Backup
+
+```bash
+# stop the server to ensure a consistent snapshot
+docker compose stop
+# copy the data volume to a local directory
+docker cp echohub-server:/app/data ./backup
+docker compose start
+```
+
+## IRC Gateway
+
+To enable IRC, set these in your `.env`:
+
+```env
+Irc__Enabled=true
+```
+
+Then uncomment the port in `docker-compose.yml`:
+
+```yaml
+ports:
+  - "5000:5000"
+  - "6697:6697"   # IRC (TLS encrypted, preferred)
+```
+
+For TLS, also set:
+
+```env
+Irc__TlsEnabled=true
+Irc__TlsCertPath=/app/data/cert.pfx
+Irc__TlsCertPassword=your_password
+```
+
+Mount your certificate into the data volume or bind-mount it directly.
+
+IRC users must have an existing EchoHub account. See [Getting Started](getting-started.md#connect-via-irc) for client connection examples.
+
+## Updating
+
+```bash
+# if using pre-built images
+docker compose pull
+docker compose up -d
+
+# if building locally
+docker compose build
+docker compose up -d
+```
+
+Data persists across updates since it lives in the named volume.
+
+## Troubleshooting
+
+**Port already in use** -- Another process is using port 5000. Change the host port in `docker-compose.yml`:
+
+```yaml
+ports:
+  - "8080:5000"   # access via http://localhost:8080
+```
+
+**Permission denied on volume** -- The container runs as a non-root `echohub` user (UID 999). If using bind mounts instead of named volumes, ensure the directory is writable.
+
+**View logs** -- Check the container output:
+
+```bash
+docker compose logs -f echohub-server
+```
+
+File-based logs are also available inside the volume at `/app/data/logs/`.

docs/articles/getting-started.md

@@ -6,6 +6,17 @@
 
 Or grab a self-contained binary from [Releases](https://github.com/HueByte/EchoHub/releases) -- no runtime needed.
 
+## Docker
+
+The quickest way to host a server:
+
+```bash
+cp .env.example .env
+docker compose up -d
+```
+
+See the [Docker guide](docker.md) for configuration, pre-built images, and more.
+
 ## Run the Server
 
 ```bash

docs/articles/toc.yml

@@ -1,5 +1,7 @@
 - name: Getting Started
   href: getting-started.md
+- name: Docker
+  href: docker.md
 - name: Architecture
   href: architecture.md
 - name: Encryption

src/EchoHub.Server/Dockerfile

@@ -23,6 +23,8 @@ RUN groupadd -r echohub && useradd -r -g echohub -d /app echohub \
     && chown -R echohub:echohub /app
 
 COPY --from=build --chown=echohub:echohub /app/publish .
+COPY --chown=echohub:echohub EchoHub.Server/docker-entrypoint.sh /app/docker-entrypoint.sh
+RUN chmod +x /app/docker-entrypoint.sh
 
 USER echohub
 
@@ -34,4 +36,4 @@ ENV ASPNETCORE_ENVIRONMENT=Production \
 
 EXPOSE 5000 6667 6697
 
-ENTRYPOINT ["dotnet", "EchoHub.Server.dll"]
+ENTRYPOINT ["/app/docker-entrypoint.sh"]

src/EchoHub.Server/docker-entrypoint.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# Persist appsettings.json in the data volume so auto-generated keys
+# (JWT secret, encryption key) survive container recreation.
+if [ ! -f /app/data/appsettings.json ]; then
+    cp /app/appsettings.example.json /app/data/appsettings.json
+fi
+ln -sf /app/data/appsettings.json /app/appsettings.json
+
+exec dotnet EchoHub.Server.dll