Update README.md

.gitignore

@@ -52,3 +52,6 @@ Module.symvers
 Mkfile.old
 dkms.conf
 
+# Build output
+build/
+

Dockerfile

@@ -9,6 +9,9 @@ RUN apk add --no-cache \
     curl-dev \
     curl-static \
     cjson-dev \
+    cjson-static \
+    zstd-dev \
+    zstd-static \
     openssl-dev \
     openssl-libs-static \
     nghttp2-dev \
@@ -34,6 +37,7 @@ RUN make STATIC=1
 FROM scratch
 
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+COPY --from=builder /etc/ssl/cert.pem /etc/ssl/cert.pem
 COPY --from=builder /build/build/dns-keeper /dns-keeper
 
 ENTRYPOINT ["/dns-keeper"]

Makefile

@@ -22,13 +22,13 @@ OBJS := $(patsubst $(SRC_DIR)/%.c, $(BUILD_DIR)/%.o, $(SRCS))
 all: $(BUILD_DIR)/$(TARGET)
 
 $(BUILD_DIR)/$(TARGET): $(OBJS)
-        $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
 
 $(BUILD_DIR)/%.o: $(SRC_DIR)/%.c | $(BUILD_DIR)
-        $(CC) $(CFLAGS) -c $< -o $@
+	$(CC) $(CFLAGS) -c $< -o $@
 
 $(BUILD_DIR):
-        mkdir -p $(BUILD_DIR)
+	mkdir -p $(BUILD_DIR)
 
 clean:
-        rm -rf $(BUILD_DIR)
+	rm -rf $(BUILD_DIR)

README.md

@@ -11,7 +11,7 @@ Every `POLL_INTERVAL` seconds, DNS Keeper will check if the IPv4 in the domain(s
 valid by seeing if `DNS_KEEPER_RECORD`.`DNS_KEEPER_DOMAIN` still points to itself.
 
 > [!NOTE]
-> On startup DNS Keeper starts a detached thread with a UDP socket on which it answers with
+> On startup DNS Keeper starts a detached thread with a UDP socket on which it answers
 > a random set of challenge bytes.  
 > DNS Keeper will send an empty data-frame to its own socket using
 > the DNS resolved IPv4 address to see if it gets a response with the correct challenge bytes.