Refactor Dockerfile and backend API for improved image processing and dependency management

docker/Dockerfile-armv7

@@ -3,7 +3,6 @@ FROM python:slim-bookworm
 ARG G4F_VERSION
 ARG G4F_USER=g4f
 ARG G4F_USER_ID=1000
-ARG PYDANTIC_VERSION=1.8.1
 
 ENV G4F_VERSION $G4F_VERSION
 ENV G4F_USER $G4F_USER
@@ -37,25 +36,9 @@ COPY requirements-min.txt $G4F_DIR
 COPY requirements-slim.txt $G4F_DIR
 
 # Upgrade pip for the latest features and install the project's Python dependencies.
-RUN pip install --no-cache-dir -r requirements-min.txt \
-  && pip install --no-cache-dir --no-binary setuptools \
-    Cython==0.29.22 \
-    setuptools \
-  # Install PyDantic
-  && pip install \
-    -vvv \
-    --no-cache-dir \
-    --no-binary :all: \
-    --global-option=build_ext \
-    --global-option=-j8 \
-    pydantic==${PYDANTIC_VERSION}
+RUN pip install --no-cache-dir -r requirements-min.txt
 RUN cat requirements-slim.txt | xargs -n 1 timeout 5m pip install --no-cache-dir || true 
 
-# Remove build packages
-RUN pip uninstall --yes \
-      Cython \
-      setuptools
-
 USER root
 
 # Clean up build deps