Add custom Pydis build workflow

.github/workflows/main.yaml

@@ -16,5 +16,5 @@ jobs:
     uses: ./.github/workflows/test.yaml
   vuln:
     uses: ./.github/workflows/vuln.yaml
-  build-push:
-    uses: ./.github/workflows/build.yaml
+  # build-push:
+  #   uses: ./.github/workflows/build.yaml

.github/workflows/pydis_build.yaml

@@ -0,0 +1,42 @@
+name: PyDis build & deploy
+
+on:
+  push:
+    branches: ["deployment"]
+
+jobs:
+  build-image:
+    name: Build & push additional images
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Github Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Generate docker image metadata
+        uses: docker/metadata-action@v5
+        id: meta
+        with:
+          images: ghcr.io/python-discord/pinnwand
+          tags: |
+              type=ref,event=tag,suffix=psql
+              type=raw,value=latest-psql
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Containerfile
+          target: psql
+          cache-from: type=registry,ref=ghcr.io/python-discord/pinnwand:latest-psql
+          cache-to: type=inline
+          tags: ${{ steps.meta.outputs.tags }}