Start Xvfb before doing anything else

Dockerfile

@@ -32,6 +32,19 @@ RUN \
     installerExtension=".exe"; \
     installer="$(mktemp --suffix="$installerExtension")"; \
     installerName="$(basename "$installer" | sed "s/$installerExtension$//")"; \
+    export DISPLAY=:90; \
+    mkdir -p --mode=777 /tmp/.X11-unix; \
+    # Create job for waiting for Xvfb to start
+    watchStarting="$(mktemp)"; \
+    { 2>&1 inotifywait -e create /tmp/.X11-unix/; } | { sed -u -e "/^Watches established.\$/e rm \"$watchStarting\""; } & \
+    displayResolver="$!"; \
+    while [ -f "$watchStarting" ]; do true; done; \
+    { \
+        # Improve arguments for screenshots
+        ARGS="$([ $DEBUG -eq 1 ] && echo "-screen 0 640x480x24 -dpi 192" || echo "")"; \
+        Xvfb "${DISPLAY}" ${ARGS} & \
+    }; \
+    displayPID="$!"; \
     rm "$installer"; \
     wget "${KEIL_URL}" --progress=bar:force:noscroll -O "$installer"; \
     [ "$DEBUG" -eq 1 ] && { \
@@ -153,19 +166,6 @@ RUN \
     kill_installer() { \
         pkill -9 "$installerName" > /dev/null 2>&1; \
     }; \
-    export DISPLAY=:90; \
-    mkdir -p --mode=777 /tmp/.X11-unix; \
-    # Create job for waiting for Xvfb to start
-    watchStarting="$(mktemp)"; \
-    { 2>&1 inotifywait -e create /tmp/.X11-unix/; } | { sed -u -e "/^Watches established.\$/e rm \"$watchStarting\""; } & \
-    displayResolver="$!"; \
-    while [ -f "$watchStarting" ]; do true; done; \
-    { \
-        # Improve arguments for screenshots
-        ARGS="$([ $DEBUG -eq 1 ] && echo "-screen 0 640x480x24 -dpi 192" || echo "")"; \
-        Xvfb "${DISPLAY}" ${ARGS} & \
-    }; \
-    displayPID="$!"; \
     # Wait for Xvfb to start
     wait "$displayResolver"; \
     /usr/bin/entrypoint wine reg add 'HKLM\Software\Wine\winedbg' /V ShowCrashDialog /T REG_DWORD /D 0; \