fix: change REFLEX_ENV from 'production' to 'prod' in Dockerfile

Reflex only accepts 'dev' or 'prod' as valid --env values.
This was causing: Error: Invalid value for '--env': 'production' is not one of 'dev', 'prod'

Changes:
- Dockerfile: REFLEX_ENV=production -> prod
- Dockerfile CMD: --env production -> prod
- docs/handbook.md: updated example command

Dockerfile

@@ -120,8 +120,8 @@ ENV PATH=/home/peikarband/.local/bin:$PATH \
     PYTHONHASHSEED=random \
     PIP_NO_CACHE_DIR=1 \
     PIP_DISABLE_PIP_VERSION_CHECK=1 \
-    REFLEX_ENV=production \
+    REFLEX_ENV=prod \
-    ENVIRONMENT=production
+    ENVIRONMENT=prod
 
 # Switch to non-root user
 USER peikarband
@@ -137,5 +137,5 @@ HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
 ENTRYPOINT ["/usr/bin/tini", "--"]
 
 # Run application
-CMD ["python", "-m", "reflex", "run", "--env", "production", "--backend-only"]
+CMD ["python", "-m", "reflex", "run", "--env", "prod", "--backend-only"]
 

docs/handbook.md

@@ -420,7 +420,7 @@ python -m reflex run
 python -m reflex run --reload
 
 # Production mode
-python -m reflex run --env production
+python -m reflex run --env prod
 ```
 
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