[FEATURE] Docker: support for setting accounts and config option directly in compose.yaml, auto creation of files (#477)

* docker config and accounts support

#Docker quality of life updates: automatic account/config generation

## summary
- a valid accounts.json and config.json are now auto-generated on first run locally into ./config/ based on current example.files
- Accounts set via ACCOUNT_1_* / ACCOUNT_2_* vars in .env or compose.yaml
- Added env.example as credentials template
- All config options exposed as CONFIG_* env vars in compose.yaml; overrides apply on every startup and take precedence over config.json
- headless always forced true in Docker
- new config handling: warns in logs if a new image adds config keys missing from existing config.json
- If there is an updated, users can delete the local config.json, and a fresh one will be generated respecting the user's env overrides in the compose file.

## Files changed
- Dockerfile, scripts/docker/entrypoint.sh, compose.yaml, env.example (new)

## Todo
- Testing (builds and runs on my system with 2 accounts, etc.)
- Tidy up over-documentation in the compose (all config options are listed for dev testing, but likely only a few are necessary like clusters, search delay, and webhook

* Update entrypoint.sh

Fix incorrectly identifying  an existing config as new, if an array value was changed.

* Tidy up compose and readme

Only commonly changed config values are included in the sample compose. All available config values added to the readme.

* add config update note

Adds a note how to easily update the config file if the example config is updated (i.e., new features added)

* Update compose.yaml

Tidied up the compose file:
- re-enabled latest image vs., local build
- for accounts, removed env_file block to simplify using a .env or adding credentials directly in the compose per user preference.
- removed  extra comments

Author: mgrimace

.gitignore

@@ -14,3 +14,4 @@ accounts.main.json
 bun.lock
 logs/
 .stfolder/
+.env

Dockerfile

@@ -39,10 +39,12 @@ ENV NODE_ENV=production \
     PLAYWRIGHT_BROWSERS_PATH=0 \
     FORCE_HEADLESS=1
 
-# Install minimal system libraries required for Chromium headless to run
+# Install minimal system libraries required for Chromium headless to run,
+# plus jq (for config generation/patching) and gettext-base (for envsubst)
 RUN apt-get update && apt-get install -y --no-install-recommends \
     cron \
     gettext-base \
+    jq \
     tzdata \
     ca-certificates \
     libglib2.0-0 \
@@ -79,11 +81,23 @@ COPY --from=builder /usr/src/microsoft-rewards-script/dist ./dist
 COPY --from=builder /usr/src/microsoft-rewards-script/package*.json ./
 COPY --from=builder /usr/src/microsoft-rewards-script/node_modules ./node_modules
 
+# Copy config example into the image so entrypoint can use it as a fallback
+# when the user hasn't mounted their own config.json
+COPY src/config.example.json ./src/config.example.json
+
+# Create the config directory and symlink config.json and accounts.json into
+# dist/ so the app finds them at its expected paths, while the entrypoint
+# writes to dist/config/ which maps to the user-facing ./config/ volume mount
+RUN mkdir -p ./dist/config \
+    && ln -s /usr/src/microsoft-rewards-script/dist/config/config.json ./dist/config.json \
+    && ln -s /usr/src/microsoft-rewards-script/dist/config/accounts.json ./dist/accounts.json
+
 # Copy runtime scripts with proper permissions from the start
 COPY --chmod=755 scripts/docker/run_daily.sh ./scripts/docker/run_daily.sh
 COPY --chmod=644 src/crontab.template /etc/cron.d/microsoft-rewards-cron.template
 COPY --chmod=755 scripts/docker/entrypoint.sh /usr/local/bin/entrypoint.sh
 
-# Entrypoint handles TZ, initial run toggle, cron templating & launch
+# Entrypoint handles TZ, accounts/config generation, initial run toggle,
+# cron templating & launch
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
-CMD ["sh", "-c", "echo 'Container started; cron is running.'"]
+CMD ["sh", "-c", "echo 'Container started; cron is running.'"]