Update docker and makefile

Dockerfile

@@ -1,17 +1,18 @@
-FROM debian:bullseye AS lindbergh-build
+FROM ubuntu:22.04 AS lindbergh-build
 
 RUN dpkg --add-architecture i386 \
-    && apt-get update \
-    && apt-get install -y --no-install-recommends \
+    && apt update \
+    && apt install -y --no-install-recommends \
         build-essential \
         gcc-multilib \
         freeglut3-dev:i386 \
         libsdl2-dev:i386 \
         libfaudio-dev:i386 \
-    && apt-get clean \
+    && apt clean \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /lindbergh-loader
+
 COPY . .
 
 RUN make

Makefile

@@ -46,17 +46,6 @@ libposixtime.so:
 
 # Clean rule
 clean:
-	rm -f $(BUILD)/lindbergh.so
-	rm -f $(BUILD)/libsegaapi.so
-	rm -f $(BUILD)/lindbergh
-	rm -f src/lindbergh/*.o
-	rm -f src/libsegaapi/*.o
-
-#clean all rule
-cleanall:
 	rm -rf $(BUILD)
 	rm -f src/lindbergh/*.o
 	rm -f src/libsegaapi/*.o
-	rm -f src/libkswapapi/*.o
-	rm -f src/libxdiff/*.a
-	rm -f src/libxdiff/xdiff/*.o