added postgres dockerfile

.github/workflows/build-postgres.yaml

@@ -0,0 +1,17 @@
+name: Build OASST Postgres image
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - docker/Dockerfile.postgres
+
+jobs:
+  build-postgres:
+    uses: ./.github/workflows/docker-build.yaml
+    with:
+      image-name: oasst-postgres
+      context: ./docker/
+      dockerfile: docker/Dockerfile.postgres
+      build-args: ""

docker/Dockerfile.postgres

@@ -0,0 +1,9 @@
+FROM postgres
+
+# install unzip
+RUN apt-get update && apt-get install -y unzip curl && rm -rf /var/lib/apt/lists/*
+
+# download aws cli
+RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
+RUN unzip awscliv2.zip
+RUN ./aws/install