Add docker build stuff

.github/workflows/deploy.yaml

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+name: Build and Deploy
+
+on:
+  push:
+  pull_request:
+    branches: [main]
+
+env:
+  GO_VERSION: 1.21
+  BEEPER_BRIDGE_TYPE: dummybridge
+  CI_REGISTRY_IMAGE: "${{ secrets.CI_REGISTRY }}/bridge/dummybridge"
+  GHCR_REGISTRY: ghcr.io
+  GHCR_REGISTRY_IMAGE: "ghcr.io/${{ github.repository }}"
+
+jobs:
+  build-docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Beeper Docker registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ secrets.CI_REGISTRY }}
+          username: ${{ secrets.CI_REGISTRY_USER }}
+          password: ${{ secrets.CI_REGISTRY_PASSWORD }}
+
+      - name: Login to ghcr
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.GHCR_REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Docker Build
+        uses: docker/build-push-action@v2
+        with:
+          cache-from: ${{ env.CI_REGISTRY_IMAGE }}:latest
+          pull: true
+          file: Dockerfile
+          tags: |
+            ${{ env.CI_REGISTRY_IMAGE }}:${{ github.sha }}
+            ${{ env.GHCR_REGISTRY_IMAGE }}:${{ github.sha }}
+          push: true
+
+  deploy-docker:
+    runs-on: ubuntu-latest
+    needs:
+      - build-docker
+    if: github.ref == 'refs/heads/main'
+    steps:
+      - name: Login to Beeper Docker registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ secrets.CI_REGISTRY }}
+          username: ${{ secrets.CI_REGISTRY_USER }}
+          password: ${{ secrets.CI_REGISTRY_PASSWORD }}
+
+      - name: Login to ghcr
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.GHCR_REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: beeper/docker-retag-push-latest@main
+        with:
+          image: ${{ env.CI_REGISTRY_IMAGE }}
+
+      - uses: beeper/docker-retag-push-latest@main
+        with:
+          image: ${{ env.GHCR_REGISTRY_IMAGE }}
+
+      - name: Run bridge CD tool
+        uses: beeper/bridge-cd-tool@main
+        env:
+          CI_REGISTRY: "${{ secrets.CI_REGISTRY }}"
+          BEEPER_DEV_ADMIN_API_URL: "${{ secrets.BEEPER_DEV_ADMIN_API_URL }}"
+          BEEPER_STAGING_ADMIN_API_URL: "${{ secrets.BEEPER_STAGING_ADMIN_API_URL }}"
+          BEEPER_PROD_ADMIN_API_URL: "${{ secrets.BEEPER_PROD_ADMIN_API_URL }}"
+          BEEPER_DEV_ADMIN_NIGHTLY_PASS: "${{ secrets.BEEPER_DEV_ADMIN_NIGHTLY_PASS }}"
+          BEEPER_STAGING_ADMIN_NIGHTLY_PASS: "${{ secrets.BEEPER_STAGING_ADMIN_NIGHTLY_PASS }}"
+          BEEPER_PROD_ADMIN_NIGHTLY_PASS: "${{ secrets.BEEPER_PROD_ADMIN_NIGHTLY_PASS }}"

Dockerfile

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+FROM golang:1-alpine3.19 AS builder
+
+RUN apk add --no-cache git ca-certificates build-base su-exec olm-dev
+
+COPY . /build
+WORKDIR /build
+RUN ./build.sh
+
+FROM alpine:3.19
+
+ENV UID=1337 \
+    GID=1337
+
+RUN apk add --no-cache su-exec ca-certificates olm bash jq yq curl
+
+COPY --from=builder /build/dummybridge /usr/bin/dummybridge
+VOLUME /data
+
+CMD ["/bin/sh", "-c", "exec su-exec $UID:$GID /usr/bin/dummybridge"]

build.sh

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+#!/bin/sh
+MAUTRIX_VERSION=$(cat go.mod | grep 'maunium.net/go/mautrix ' | awk '{ print $2 }')
+GO_LDFLAGS="-X main.Tag=$(git describe --exact-match --tags 2>/dev/null) -X main.Commit=$(git rev-parse HEAD) -X 'main.BuildTime=`date -Iseconds`' -X 'maunium.net/go/mautrix.GoModVersion=$MAUTRIX_VERSION'"
+if [ "$DBG" = 1 ]; then
+    GO_GCFLAGS='all=-N -l'
+else
+    GO_LDFLAGS="-s -w ${GO_LDFLAGS}"
+fi
+go build -gcflags="$GO_GCFLAGS" -ldflags="$GO_LDFLAGS" -o dummybridge ./cmd/dummybridge "$@"