feat: initial docker image

Dockerfile

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+# inspirado por los españolitos de muchobien/docker-pocketbase! gracias!
+
+FROM alpine:latest AS download
+
+ARG VERSION
+ADD https://github.com/pocketbase/pocketbase/releases/download/v${VERSION}/pocketbase_${VERSION}_linux_amd64.zip /pb.zip
+RUN unzip /pb.zip && chmod +x /pocketbase
+
+FROM alpine
+RUN apk update && apk add --no-cache ca-certificates && rm -rf /var/cache/apk/*
+COPY --from=download /pocketbase /bin/pocketbase
+
+VOLUME /data
+EXPOSE 8090
+
+# https://www.baeldung.com/linux/difference-ip-address
+ENTRYPOINT ["/bin/pocketbase", "serve", "--http=0.0.0.0:8090", "--dir=/data"]