fix: Docker image is missing build dependencies

Dockerfile

@@ -4,13 +4,16 @@ WORKDIR /tmp/
 COPY debian/control /tmp/
 
 RUN apt-get update && \
-	apt-get install -y --no-install-recommends devscripts/stable equivs/stable libauthen-webauthn-perl/stable && \
+	apt-get install -y --no-install-recommends devscripts/stable equivs/stable libauthen-webauthn-perl/stable yui-compressor/stable python3-sphinx/stable python3-sphinx-bootstrap-theme/stable cpanminus/stable uglifyjs/stable coffeescript/stable && \
 	mk-build-deps /tmp/control && \
 	apt-get install -y --no-install-recommends /tmp/lemonldap-ng-build-deps*deb && \
 	apt-get purge -y devscripts equivs && apt-get autoremove -y && \
 	apt-get clean && \
 	rm -rf /var/lib/apt/lists/*
 
+COPY Makefile /tmp/
+RUN cpanm "Perl::Tidy@$(make tidyversion)"
+
 WORKDIR /app/
 
 ENV LLNG_DEFAULTCONFFILE="/app/dev/lemonldap-ng.ini"