Include sha256 implementation

Makefile

@@ -3,13 +3,14 @@ CFLAGS=-Wall -Wextra
 LIBWS=./vendor/libmicrohttpd/
 LIBWS_LIB=$(LIBWS)lib/libmicrohttpd.a
 
+LIBSHA=./vendor/sha256/
+LIBSHA_SRC=$(LIBSHA)sha256.c
+
 LDFLAGS=-lm
-INCL_FLAGS=-I$(LIBWS)include
+INCL_FLAGS=-I$(LIBWS)include -I$(LIBSHA)
 
-
-main: src/main.c output
+main: src/main.c $(LIBSHA_SRC) output
 	gcc $(CFLAGS) $(INCL_FLAGS) -o output/main src/main.c $(LIBWS_LIB) $(LDFLAGS)
 
-
 output:
 	mkdir -p output