docker: publish as package on ghcr.io

.github/workflows/docker.yml

···
+name: Deploy Docker image
+on:
+  push:
+    branches:
+      - master
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v3
+
+      - name: Login to GitHub container registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

docker-compose.yml

···
             - 8082:8082
         environment:
             PKCSPASSWD: $PKCSPASSWD
+            DATABASE_URL: postgres://lumina:1@db/lumina
         volumes:
             - ./dockershare:/dockershare
         links:

docker-init.sh

···
 #!/bin/sh
 CFGPATH="/dockershare"
 KEYPATH="/lumen/lumen.p12"
-export DATABASE_URL="postgres://lumina:1@db/lumina"
 die(){
     echo "Exiting due to error: $@" && exit 1
 }