docs(docker): add labels to image

Signed-off-by: Universal Studio <[email protected]>

Dockerfile

@@ -1,3 +1,20 @@
 FROM scratch
+
+LABEL repository="https://github.com/TMUniversal/papercrypt" \
+    homepage="https://github.com/TMUniversal/papercrypt/blob/main/README.md" \
+    maintainer="TMUniversal <[email protected]>" \
+    Vendor="TMUniversal" \
+    org.opencontainers.image.base.name="scratch" \
+    org.opencontainers.image.base.digest="" \
+    org.opencontainers.image.title="PaperCrypt" \
+    org.opencontainers.image.description="PaperCrypt is a Go-based command-line tool designed to enhance the security of your sensitive data through the generation of printable backup documents." \
+    org.opencontainers.image.authors="TMUniversal <[email protected]> (https://tmuniversal.eu)" \
+    org.opencontainers.image.vendor="TMWare" \
+    # Source is overridden by the build system
+    org.opencontainers.image.source="https://github.com/TMUniversal/papercrypt" \
+    org.opencontainers.image.documentation="https://github.com/TMUniversal/papercrypt/blob/main/README.md" \
+    org.opencontainers.image.url="https://github.com/users/TMUniversal/packages/container/package/papercrypt" \
+    org.label-schema.usage="docker run --rm -it -v \$PWD:/data ghcr.io/tmuniversal/papercrypt:latest generate -i /data/myfile.txt -o /data/output.pdf --purpose 'Backup' --comment 'This is a backup of myfile.txt'"
+
 COPY papercrypt /
 ENTRYPOINT ["/papercrypt"]