update build

.gitignore

@@ -1 +1 @@
-./bin
+bin/

Makefile

@@ -1,9 +1,13 @@
 OUTPUT_DIR = ./bin
-OUTPUT = -o $(OUTPUT_DIR)/PROG
-SOURCES = *.c
+OUTPUT_BIN = ${OUTPUT_DIR}/PROG
+OUTPUT = -o ${OUTPUT_BIN}
+SOURCES = ./cmd/lock.c
 
 build: output_dir
-	gcc -Wall ${SOURCES} ${OUTPUT:PROG=upgrade}
+	gcc -Wall ${SOURCES} ${OUTPUT:PROG=package-lock}
 
 output_dir:
 	mkdir -p ${OUTPUT_DIR}
+
+install:
+	mv ${OUTPUT_BIN:PROG=package-lock} /usr/sbin/