Add AFFiNE pod creation script with PostgreSQL and Redis

Shell script to create a rootless Podman pod running AFFiNE v0.26.3
with pgvector/PostgreSQL and Redis, managed via systemd user services.
Exposes AFFiNE Web UI and GraphQL API on port 8092.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

prompt_shell-script.md

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+# Podman shell script for AFFiNE service
+
+## Motivation
+
+A Podman Pod is needed on a Linux server which provides an AFFiNE service.
+This Podman Pod needs to be created and started with a shell script which needs to be designed.
+
+The AFFiNE service will be used by humans and by AI agents; it will also be part of a design environment for designing a special MCP server for AFFiNE.
+
+## Shell script requirements
+
+Requirements for the shell script:
+- Must use a container image with a Pinned Tag (for exact consistency) which points to the AFFiNE version 0.26.3. The name likely is something like "ghcr.io/toeverything/affine:0.26.3".
+- Must provide the AFFiNE web user interface at port 8092.
+- Must provide the GraphQL API. Background: The AFFiNE web and desktop apps use an internal GraphQL API to communicate with the backend. There is a /graphql endpoint but it is not documented for third-party use.
+- Must be in folder /home/pln/bin.
+- Must have the name create_pod_affine.sh
+
+The shell script shall be run by user pln which has permissions to run rootless pods.
+
+## Shell script style
+
+The needed shell script must have the same style as other shell scripts on the server.
+
+These files are examples:
+/home/lwc/bin/create_pod_langflow.sh
+/home/krt/bin/create_pod_qdrant.sh
+
+## Your tasks
+
+### Ask first
+
+Before starting to design the shell script, ask between two and five questions to fully understand the situation, your tasks and the objectives.
+
+### Identify the container image
+
+Find the container image with Pinned Tag pointing to AFFiNE version 0.26.3.
+
+### Write the shell script
+
+Write the shell script.
+
+### Test the shell script
+
+Run the shell script and test it.
+
+### Redesign if necessary
+
+If the test failed, understand the problem, improve the shell script and go back to Test the shell script.
+
+Repeat this in a loop up to five times.
+
+## Your objectives
+
+Your objectives are:
+- All requirements are fulfilled.
+- AFFiNE web user interface shows up at 127.0.0.1:8092.
+- The AFFiNE GraphQL API shows up under 127.0.0.1:8092 at /graphql or another link.
+
+## Your behaviour
+
+If it is not possible to achieve your objectives, interrupt and ask me.
+
+Complete all your tasks without asking in between if you can achieve your objectives.