Merge branch 'master-staging' into 'master'

Add Makefile, gitignore, and test .c file

See merge request arn2/git-tutorial!1

.gitignore

+*.o
+main

Makefile

+src = $(wildcard *.c)
+obj = $(src:.c=.o)
+
+main: $(obj)
+	$(CC) -o $@ $^
+
+.PHONY: clean
+clean:
+	rm -f $(obj) myprog

main.c

+#include <stdio.h>
+
+int main() {
+    printf("Hello new flight software members!\n");
+}