Fix hadolint: remove FROM quotes, add DL3018 ignore for apk

Dockerfile

@@ -1,9 +1,10 @@
-FROM "alpine:3.23"
+FROM alpine:3.23
 LABEL maintainer="Cabillot Julien <dockerimages@cabillot.eu>"
 
 COPY entrypoint.sh /entrypoint.sh
 COPY patch.py /tmp/patch.py
 
+# hadolint ignore=DL3018
 RUN apk add --no-cache offlineimap openssl && \
     adduser -D offlineimap && \
     # Force SECLEVEL=1 in imaplib2 to allow connecting to servers with weak DH keys (DH_KEY_TOO_SMALL)
@@ -15,7 +16,7 @@ RUN apk add --no-cache offlineimap openssl && \
 COPY --chown=offlineimap offlineimaprc.*.tmpl /home/offlineimap/
 
 # Add Tini
-#ENV "TINI_VERSION" "v0.16.1"
+ENV "TINI_VERSION" "v0.16.1"
 #ADD "https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini" "/tini"
 #RUN chmod +x "/tini"
 #ENTRYPOINT ["/tini", "--"]