move file-transfer -> tutorials

tutorials/http/file-transfer/Makefile

@@ -0,0 +1,35 @@
+SPROG ?= server                   # Program we are building
+CPROG ?= client                   # Program we are building
+DELETE = rm -rf                   # Command to remove files
+SOUT ?= -o $(SPROG)               # Compiler argument for output file
+COUT ?= -o $(CPROG)               # Compiler argument for output file
+SSOURCES = server.c mongoose.c    # Source code files
+CSOURCES = client.c mongoose.c    # Source code files
+CFLAGS = -W -Wall -Wextra -g -I.  # Build options
+
+# Mongoose build options. See https://mongoose.ws/documentation/#build-options
+#CFLAGS_MONGOOSE += -DMG_ENABLE_LINES
+
+ifeq ($(OS),Windows_NT)   # Windows settings. Assume MinGW compiler. To use VC: make CC=cl CFLAGS=/MD OUT=/Feprog.exe
+  SPROG ?= server.exe             # Use .exe suffix for the binary
+  CPROG ?= client.exe             # Use .exe suffix for the binary
+  CC = gcc                        # Use MinGW gcc compiler
+  CFLAGS += -lws2_32              # Link against Winsock library
+  DELETE = cmd /C del /Q /F /S    # Command prompt command to delete files
+  SOUT ?= -o $(SPROG)             # Build output
+  COUT ?= -o $(CPROG)             # Build output
+endif
+
+all: example                      # Default target. Build all and run server
+	$(RUN) ./$(SPROG) $(SARGS)
+
+example: $(SPROG) $(CPROG)            
+
+$(SPROG): $(SSOURCES)       # Build program from sources
+	$(CC) $(SSOURCES) $(CFLAGS) $(CFLAGS_MONGOOSE) $(CFLAGS_EXTRA) $(SOUT)
+
+$(CPROG): $(CSOURCES)       # Build program from sources
+	$(CC) $(CSOURCES) $(CFLAGS) $(CFLAGS_MONGOOSE) $(CFLAGS_EXTRA) $(COUT)
+
+clean:                      # Cleanup. Delete built program and all build artifacts
+	$(DELETE) $(SPROG) $(CPROG) *.o *.obj *.exe *.dSYM