diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..ed99021
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,5 @@
+.devcontainer
+.git*
+*.md
+action.yml
+LICENSE
diff --git a/Containerfile b/Containerfile
index e0be396..00708e0 100644
--- a/Containerfile
+++ b/Containerfile
@@ -16,10 +16,12 @@ ENV WEB_UI="false"
 ENV SECURE_BOOT_KEY_URL=""
 ENV ENROLLMENT_PASSWORD="ublue-os"
 
-COPY / /isogenerator
+COPY ./ /isogenerator
 WORKDIR /isogenerator
 
-RUN dnf install -y make && make install-deps
+RUN dnf install -y make && \
+  make install-deps && \
+  dnf clean all
 
 VOLUME /isogenerator/output