fix(ci): replace drone with gitea actions

Dockerfile

@@ -1,29 +1,5 @@
-FROM docker.io/library/golang:1.22.3-alpine3.18 as build
+FROM scratch AS build
 
-ARG VERSION
-
-COPY ./ /workspace
-
-WORKDIR /workspace
-
-RUN set -ex && \
-    apk update && \
-    apk add git make && \
-    make all VERSION=${VERSION}
-
-# TARGET
-# =====================================================================
-FROM docker.io/library/alpine:3.21
-
-ARG VERSION=latest
-
-LABEL org.opencontainers.image.authors="Markus Pesch" \
-      org.opencontainers.image.description="Return the ip address of the router to forward traffic to an external ip address" \
-      org.opencontainers.image.documentation="https://git.cryptic.systems/volker.raschek/getpsrc#getpsrc" \
-      org.opencontainers.image.title="getpsrc" \
-      org.opencontainers.image.vendor="Markus Pesch" \
-      org.opencontainers.image.version="${VERSION}"
-
-COPY --from=build /workspace/getpsrc /usr/bin/getpsrc
+COPY getpsrc-* /usr/bin/getpsrc
 
 ENTRYPOINT [ "/usr/bin/getpsrc" ]