Adding docker file and Github Action Workflow

.dockerignore

@@ -0,0 +1,5 @@
+.env
+.git
+.github
+*.exe
+/frodo-bot

.github/workflows/deploy.yml

@@ -0,0 +1,68 @@
+name: Deploy
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+env:
+  IMAGE: ghcr.io/simonkimdev/frodo-bot
+
+jobs:
+  image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        if: github.ref == 'refs/heads/main'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Pull requests only check that the image builds; main also pushes it.
+      - uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: ${{ github.ref == 'refs/heads/main' }}
+          tags: |
+            ${{ env.IMAGE }}:${{ github.sha }}
+            ${{ env.IMAGE }}:latest
+          labels: org.opencontainers.image.source=${{ github.server_url }}/${{ github.repository }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+  deploy:
+    needs: image
+    if: github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    concurrency: deploy
+    permissions:
+      contents: read
+      id-token: write
+    steps:
+      - uses: azure/login@v2
+        with:
+          client-id: ${{ vars.AZURE_CLIENT_ID }}
+          tenant-id: ${{ vars.AZURE_TENANT_ID }}
+          subscription-id: ${{ vars.AZURE_SUBSCRIPTION_ID }}
+
+      - name: Deploy the new image
+        run: |
+          az config set extension.use_dynamic_install=yes_without_prompt
+          az containerapp update \
+            --name "${{ vars.AZURE_CONTAINER_APP }}" \
+            --resource-group "${{ vars.AZURE_RESOURCE_GROUP }}" \
+            --image "${{ env.IMAGE }}:${{ github.sha }}" \
+            --output none

Dockerfile

@@ -0,0 +1,15 @@
+# syntax=docker/dockerfile:1
+
+FROM golang:1.26-alpine AS build
+WORKDIR /src
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o /out/frodo-bot ./cmd/frodo-bot
+
+# distroless/static has CA certificates (needed for Discord's TLS) and nothing else; runs as a non-root user.
+FROM gcr.io/distroless/static-debian12:nonroot
+COPY --from=build /out/frodo-bot /frodo-bot
+ENTRYPOINT ["/frodo-bot"]

README.md

@@ -3,11 +3,26 @@
 A Discord bot that does one thing: whenever someone says "secret",
 bot replies with "Alright then, keep your secrets."
 
-## Setup
+## Add Frodo to your server
+
+**[Invite Frodo](https://discord.com/oauth2/authorize?client_id=1561964364746195014&permissions=84992&integration_type=0&scope=bot+applications.commands)**
+
+This is a hosted instance that always runs the latest `main` of this repo, so there's nothing to set up.
+If you'd rather run your own, see [Self-hosting](#self-hosting).
+
+## Commands
+
+| Command       | Description                                                         |
+| ------------- | ------------------------------------------------------------------- |
+| /morgul-blade | Stab Frodo with the cursed Morgul blade to silence him indefinitely |
+
+## Self-hosting
 
 ### Pre-Requisite
 
-Only the self hosting is supported atm. You'd need to register your own bot on discord dev portal.
+Register your own bot on the [Discord Developer Portal](https://discord.com/developers/applications),
+and enable **Message Content Intent** in its Bot tab. Invite it with the `bot` and
+`applications.commands` scopes.
 
 ### 1. Configure
 
@@ -28,11 +43,12 @@ Then fill in `.env`:
 go run ./cmd/frodo-bot
 ```
 
-### 3. Supported Commands
+Or with Docker:
 
-| Command       | Description                                                         |
-| ------------- | ------------------------------------------------------------------- |
-| /morgul-blade | Stab Frodo with the cursed Morgul blade to silence him indefinitely |
+```bash
+docker build -t frodo-bot .
+docker run --rm --env-file .env frodo-bot
+```
 
 Press `Ctrl+C` to stop.