Reduce Docker image size

* Remove compiled sources. Most of them are never used. Those in use are compiled in the first run really fast.
* Copy only source code and Docker entypoint
* Image size reduced by 41 MB (195 MB -> 154 MB uncompressed)

Dockerfile

@@ -45,21 +45,21 @@ RUN apk upgrade --no-cache \
     uwsgi \
     uwsgi-python3 \
     brotli \
- && pip3 install --upgrade pip wheel setuptools \
  && pip3 install --no-cache -r requirements.txt \
  && apk del build-dependencies \
- && rm -rf /root/.cache
+ && rm -rf /root/.cache \
+ && find /usr/lib/python*/ -name '*.pyc' -delete
 
-COPY --chown=searxng:searxng . .
+COPY --chown=searxng:searxng dockerfiles ./dockerfiles
+COPY --chown=searxng:searxng searx ./searx
 
 ARG TIMESTAMP_SETTINGS=0
 ARG TIMESTAMP_UWSGI=0
 ARG VERSION_GITCOMMIT=unknown
 
-RUN su searxng -c "/usr/bin/python3 -m compileall -q searx"; \
-    touch -c --date=@${TIMESTAMP_SETTINGS} searx/settings.yml; \
-    touch -c --date=@${TIMESTAMP_UWSGI} dockerfiles/uwsgi.ini; \
-    find /usr/local/searxng/searx/static -a \( -name '*.html' -o -name '*.css' -o -name '*.js' \
+RUN touch -c --date=@${TIMESTAMP_SETTINGS} searx/settings.yml \
+ && touch -c --date=@${TIMESTAMP_UWSGI} dockerfiles/uwsgi.ini \
+ && find /usr/local/searxng/searx/static -a \( -name '*.html' -o -name '*.css' -o -name '*.js' \
     -o -name '*.svg' -o -name '*.ttf' -o -name '*.eot' \) \
     -type f -exec gzip -9 -k {} \+ -exec brotli --best {} \+