Merge pull request #18 from rails/postgres-client-feature

Create a feature for installing postgres client dependencies

features/postgres-client/README.md

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+# Postgres Client
+
+Installs needed client-side dependencies for Rails apps using Postgres.
+
+NOTE: This feature does not install the dependencies needed for the Postgres server. For that we recommend running a
+service using the official [Postgres docker image](https://hub.docker.com/_/postgres).
+
+## Example Usage
+
+```json
+"features": {
+    "ghcr.io/rails/devcontainer/features/postgres-client": {}
+}
+```
+
+## Options
+
+## Customizations
+
+## OS Support
+
+This Feature should work on recent versions of Debian/Ubuntu-based distributions with the `apt` package manager installed.
+
+`bash` is required to execute the `install.sh` script.

features/postgres-client/devcontainer-feature.json

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+{
+    "id": "postgres-client",
+    "version": "0.1.0",
+    "name": "Postgres Client",
+    "description": "Installs needed client-side dependencies for Rails apps using Postgres"
+}

features/postgres-client/install.sh

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+apt-get update -y && apt-get -y install --no-install-recommends libpq-dev
+
+rm -rf /var/lib/apt/lists/*