Update dockerfile to latest version

Use of a current Alpine version and therefore a more current Tor version.
Furthermore, git was added as a dependency, as this is necessary to install all required pip packages.

Signed-off-by: Marek Küthe <m.k@mk16.de>

Dockerfile

@@ -1,14 +1,14 @@
-FROM alpine:3.15 
+FROM alpine:3.18
 
 #Base settings
 ENV HOME /root
 
 COPY requirements.txt /root/requirements.txt
 
 #Install ZeroNet
-RUN apk --update --no-cache --no-progress add python3 python3-dev py3-pip gcc g++ autoconf automake libtool libffi-dev musl-dev make tor openssl \
+RUN apk --update --no-cache --no-progress add python3 python3-dev py3-pip gcc g++ autoconf automake libtool libffi-dev musl-dev make tor openssl git \
  && pip3 install -r /root/requirements.txt \
- && apk del python3-dev gcc g++ autoconf automake libtool libffi-dev musl-dev make \
+ && apk del python3-dev gcc g++ autoconf automake libtool libffi-dev musl-dev make git \
  && echo "ControlPort 9051" >> /etc/tor/torrc \
  && echo "CookieAuthentication 1" >> /etc/tor/torrc