fix: don't buffer stdout even if not a terminal

Dockerfile

@@ -23,6 +23,7 @@ RUN if [ -n "${CI_COMMIT_SHA}" ]; then \
             "https://s3.rustybever.be/vieter/commits/${CI_COMMIT_SHA}/vieter-$(echo "${TARGETPLATFORM}" | sed 's:/:-:g')" && \
             chmod +x vieter ; \
     else \
+        cd src && v install && cd .. && \
         LDFLAGS='-lz -lbz2 -llzma -lexpat -lzstd -llz4 -lsqlite3 -static' make prod && \
         mv pvieter vieter ; \
     fi

src/main.v

@@ -12,6 +12,11 @@ import cron
 import agent
 
 fn main() {
+	// Stop buffering output so logs always show up immediately
+	unsafe {
+		C.setbuf(C.stdout, 0)
+	}
+
 	mut app := cli.Command{
 		name: 'vieter'
 		description: 'Vieter is a lightweight implementation of an Arch repository server.'