diff --git a/builder/dockerfile.alpine_319.apk.build b/builder/dockerfile.alpine_319.apk.build
index a0930b4..7771b48 100644
--- a/builder/dockerfile.alpine_319.apk.build
+++ b/builder/dockerfile.alpine_319.apk.build
@@ -1,6 +1,18 @@
 FROM alpine:3.19
 
 RUN apk add shadow bash
+RUN apk add abuild sudo less
+
+ENV HOME /src/alpine
+WORKDIR $HOME/kasmvncserver
+
+ARG KASMVNC_ALPINE_PRIVATE_KEY
+ARG KASMVNC_ALPINE_PUBLIC_KEY
+ENV APK_KEYS_DIR=/etc/apk/keys
+RUN echo -n "$KASMVNC_ALPINE_PRIVATE_KEY" > \
+  $APK_KEYS_DIR/kasmvnc_signing_key.rsa
+RUN echo -n "$KASMVNC_ALPINE_PUBLIC_KEY" > \
+  $APK_KEYS_DIR/kasmvnc_signing_key.rsa.pub
 
 RUN useradd -m docker && echo "docker:docker" | chpasswd