setup on-pr action

.github/workflows/_docker.yml

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+name: ~ build
+
+on:
+  workflow_call:
+    inputs:
+      tag:
+        type: string
+        required: true
+
+jobs:
+  builder:
+    name: builder image
+    runs-on: ubuntu-22.04
+    steps:
+      - name: 'Checkout GitHub Action'
+        uses: actions/checkout@main
+
+      - name: 'Login to GitHub Container Registry'
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: 'Build Postgres Image'
+        run: |
+          docker build \
+            -f Dockerfile.postgres \
+            --platform linux/amd64 \
+            -t ghcr.io/trycompa/postgres:${{ inputs.tag }} .
+          docker push ghcr.io/trycompa/postgres:${{ inputs.tag }}

.github/workflows/main.yml

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+name: main
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  docker:
+    name: docker
+    uses: ./.github/workflows/_docker.yml
+    with:
+      tag: '14'

.github/workflows/pull_request.yml

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+name: pr
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  docker:
+    name: docker
+    uses: ./.github/workflows/_docker.yml
+    with:
+      tag: 14-${{ github.sha }}

Dockerfile.postgres

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+# Same major version as production
+FROM imresamu/postgis:14-3.4
+LABEL org.opencontainers.image.source="https://github.com/trycompa/docker-postgres"
+
+
+# Install build dependencies and pgvector
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    git \
+    postgresql-server-dev-14 \
+    && git clone --branch v0.5.1 https://github.com/pgvector/pgvector.git \
+    && cd pgvector \
+    && make \
+    && make install \
+    && cd .. \
+    && rm -rf pgvector \
+    && apt-get remove -y build-essential git postgresql-server-dev-14 \
+    && apt-get autoremove -y \
+    && rm -rf /var/lib/apt/lists/*
+
+# log all queries
+CMD ["postgres", "-c", "log_statement=all"]