add container, starting pack, build instructions

.drone.yml

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+kind: pipeline
+name: default
+
+steps:
+  - name: build-container
+    image: plugins/docker
+    settings:
+      repo: git.saintnet.tech/stryan/saintnet_stickers
+      registry: git.saintnet.tech
+      password:
+        from_secret: build_pass
+      username:
+        from_secret: build_username
+      dockerfile: Containerfile
+      tags: latest
+      secrets_from_env:
+        - pack_config=CONFIG_JSON

Containerfile

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+FROM python:3.11.4-bookworm as builder
+WORKDIR /srv
+COPY . .
+RUN pip install --no-cache-dir -r requirements.txt
+RUN pip install .
+RUN --mount=type=secret,id=pack_config ./create_packs.sh
+
+FROM nginx:alpine
+COPY --from=0 /srv/web /usr/share/nginx/html
+

create_packs.sh

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+#!/bin/bash
+cp /run/secrets/pack_config config.json
+for d in packs/*/ ; do
+    sticker-pack $d --add-to-index web/packs/
+done
+rm config.json