[enh] container: build with uv (#5199)

This commit replaces `pip` in container builds with `uv` pip compat
with a 1:1 parity. The only thing that changes is the installation speed of the
wheels, which seems to be considerably faster, although I haven't been able to
properly quantify this yet.

uv also gives us more tools to manage the cache. We can revert the prior cache
changes in `container.yml` as we won't have duplicated wheels anymore.

container/base-builder.yml

@@ -6,7 +6,7 @@ contents:
     - alpine-base
     - build-base
     - python3-dev
-    - py3-pip
+    - uv
     - brotli
 
 entrypoint:

container/builder.dockerfile

@@ -2,10 +2,13 @@ FROM ghcr.io/searxng/base:searxng-builder AS builder
 
 COPY ./requirements*.txt ./
 
-RUN --mount=type=cache,id=pip,target=/root/.cache/pip set -eux; \
-    python -m venv ./.venv/; \
-    . ./.venv/bin/activate; \
-    pip install -r ./requirements.txt -r ./requirements-server.txt
+ARG TIMESTAMP="0"
+
+RUN --mount=type=cache,id=uv,target=/root/.cache/uv set -eux; \
+    uv venv; \
+    uv pip install --no-managed-python --compile-bytecode --requirements ./requirements.txt --requirements ./requirements-server.txt; \
+    uv cache prune --ci; \
+    find ./.venv/ -exec touch -h -t $TIMESTAMP {} +
 
 COPY ./searx/ ./searx/
 
@@ -13,12 +16,12 @@ ARG TIMESTAMP_SETTINGS="0"
 
 RUN set -eux; \
     python -m compileall -q ./searx/; \
-    touch -c --date=@$TIMESTAMP_SETTINGS ./searx/settings.yml; \
+    touch -c -t $TIMESTAMP_SETTINGS ./searx/settings.yml; \
     find ./searx/static/ -type f \
-        \( -name "*.html" -o -name "*.css" -o -name "*.js" -o -name "*.svg" \) \
-        -exec gzip -9 -k {} + \
-        -exec brotli -9 -k {} + \
-        -exec gzip --test {}.gz + \
-        -exec brotli --test {}.br +; \
+    \( -name "*.html" -o -name "*.css" -o -name "*.js" -o -name "*.svg" \) \
+    -exec gzip -9 -k {} + \
+    -exec brotli -9 -k {} + \
+    -exec gzip --test {}.gz + \
+    -exec brotli --test {}.br +; \
     # Move always changing files to /usr/local/searxng/
     mv ./searx/version_frozen.py ./