Use x86-64-v3 Microarch

docker/Dockerfile

@@ -20,10 +20,10 @@ COPY ./assets/ ./assets/
 COPY ./videojs-dependencies.yml ./videojs-dependencies.yml
 
 RUN crystal spec --warnings all \
-    --link-flags "-lxml2 -llzma"    
+    --link-flags "-lxml2 -llzma"
 RUN if [[ "${release}" == 1 ]] ; then \
         crystal build ./src/invidious.cr \
-        --release \
+        --release --mcpu=x86-64-v3 \
         --static --warnings all \
         --link-flags "-lxml2 -llzma"; \
     else \