Add Dockerfile and workflow

.github/workflows/ci.yaml

@@ -0,0 +1,23 @@
+---
+
+name: Build Docker image
+
+env:
+  POSTGRES_VERSION: "15.3"
+  PGVECTOR_VERSION: "0.4.4"
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  build-image:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build image
+        run: |
+          docker build --build-arg="POSTGRES_VERSION=${POSTGRES_VERSION}" --build-arg="PGVECTOR_VERSION=${PGVECTOR_VERSION}" --tag "ghcr.io/Zapgram/cimg-postgres-pgvector:${POSTGRES_VERSION}-${PGVECTOR_VERSION}" .

Dockerfile

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+ARG POSTGRES_VERSION
+ARG PGVECTOR_VERSION
+
+FROM cimg/postgres:${POSTGRES_VERSION}
+
+RUN cd /tmp \
+    && git clone --branch v${PGVECTOR_VERSION} https://github.com/pgvector/pgvector.git \
+    && cd pgvector \
+    && make \
+    && make install \
+    && cd /tmp \
+    && rm -rf /tmp/pgvector